Boiler with superheater



B. Bn'omo. BOI'LER WITH SUPERHEATEE. APPLl-CTION FILED MAYS, 1918.

h Patented May 23, 1922.

a SHEETS-SHEET 1.'

. BROIDO.

BOILER WITH SUPERHEATIH.

APPLICATION FILED MAY 9. IQIa.

\ Patented May23, 1922.

a SHEETS-SHEET 2.

B. BHolno.'

BmLER WITH SUPERHEATER'. APPLICATION FILED MAY 9. 1918.

Patented May 23 g /7//5 mbo/514mg ffl!" Mv www nmwnmn' nac, or NEW Yoan,n. Y., assrenon ro ran snrnmanafrnn corvi- JPANY, OF YOR, N. Y., ACORPORATION F DELAWARE.

norman Winn snrnnnnarnn.

Specification of Ztetters Pate-nt. Patmgntqgd May 23, 3922 .ppl-icationled May'9, 1.916.l Serial No. 233,448.

I To all tif/nay concern.'

Be it known that'll, BENJAMIN lBRoIno, a citizen of the United States,and resident ofthe city of [New York, State of New York,

have invented certain new4 and useful llmthe groups Iof dliverging watertubes 1, 1'

'provements Boilers withffuperheaters, of which, the following is aspeclfcation.

This invention relates to boilers with superheaters and more articularlyto bellers comprising water tu es arranged so that they form two Igroupsdeflninga space between them in therlower part of'vwhich is located' thefurnace. j

i It is the purpose of my present invention to make provisionforasuperheaterin such boilers capable of superheatin steam to a highdegree and yet proper y protected against excessive heat.

The invention will "be'readily understood from the following.description which is to be read in connection with the accompanyingdrawings'forming part hereof. lln the drawings, ig..1\is a transverselsection,-and Figs. 2 and 3. are longitudinal sections with rportionsbinitted on lines 2-2 and 3-3 respectively'ofFig. 1,'of a boiler of'thistype with my device 1n place; Fig. 4 is a section, on an enlarged scaleon line 4--4 of Figs. 1 and 2, showing a' detail; Fi 5 is a view similarto Fig. 1 of a vmodihgcation shown in a different form of-boiler; tion-online 6--6 of Fig. 5 trates 'a modification.

6 is a secf ig. 7 illus- Reference will first be'made to the form.

of my 'device shown in Figs. 1 to 4. l-lere are connectedto upper drums2, 2 and lower drums 3, 3; and' dene betweenl them the space4 in thelower ortion of which is located the furnace. n each side of theseinclined groups of tubes are vertical groups 5, connected to upper drums6 and lower drums 7. Together with groups 1 the groups 5 deline the twotriangular spaces 8. The drums 9 are located between drums 2 and 6 on'either side, and communicate with them by pipes. Baiiies 10 close thespaces between laterally ad'acent groups ofl tubes' so that gases fromurnace 4, to reach exits 11, are forced to, pass among the tubes of thevarious Agroups and throughthe spaces I 12 between the outermost tubesof each group (see Fig. 3).

The boiler is enclosed by the setting is.

lt0n the other hand,

The structure thus blley described is a commercial formof boiler wellknown 4totho'se skllled 1n this art, and has notxbeenV superheater, thesuperheater must be located' `so that gases from the furnace reach itbefore they have been cooled appreciably or at all by contact withwater-cooled surfaces. rotection against the intense radiant heat romthe furnace must be provided to avoid injury to the superheater. l.attain these objects by my invention.'

I locate a superheater 14` of any desired construction, in the upperpart of space 4, where it will be swept by hot gases from the furnacethat have not been cooled at allk .0r to any appreciable extent bycontact with 'boiler surfaces. To protect the superheater against theintense radiant heat from the furnace, which would be likely to injureit particularly during possible temporary interruptions of steam iiowthrough the superheater, two arches 15 and 16 are provided,

both of them located below the superheater,

one ,above the other, and relatively staggered, so that together theyintercept4 the radiation, but flowv of gases to the superheater betweenthem and around them is free to occur.

Tn order to regulate the gas flow over the superheater, the hood 17a anddamper 18 are xin the manner now to be deprovided. This hoodhas theshape, in cross'- section, of an inverted V, one side being providedwith an opening 19. Extendlng 1nward from the lower end of this openingtoward the other leg of the inverted V, but terminating short of it, isthe horizontal wall 20. This wall is above the superheater. Slidablethrough a slot 21 is the damper 18, referred to above, which in itslowest position, completely interrupts the flow of gases through thehood 17 and over the super- .heater 14, and in intermediate positlonschecks it more or less. This damper is preferably made in severalsections, as shown in Figs. 2 and 3, each section sliding in grooves 22,22 of the posts 23.

In Fig. 2, the dempers in the lett half of llt the boiler are showncompletely lowered and in the ri ht half they are shown partly lowered.hen the dampers are partly or wholly lowered, the flow of gases over thesuperheater is evidently partly or completely interrupted, and thedanger of over-heating it can be averted. This is necessaryparticularly` during periods when no steam is ilowing through thesuperheater, as while the boiler is beingiired up, or when the enginelis temporarily stopped.

lf desired, the steam to be superheated may evidently be carrieddirectlyy to the superheater 14 from the drums 9 of the boiler. ln mypreferred form, however', as herein illustrated, 1 iirst carry the steamfromeach drum 9 through pipes 25 to a eral parallel steam-paths, insuperheater 14 is `made smaller than the sum of the two steam areas ofsuperheaters 24-24, in order to increase the velocityof'steam flowthrough superheater 14. By doing this the rate of carrying ofi' the heatfrom the superheater, and so cooling it, is increased, and the danger ofoverheating it is lessened. This feature of increasing the velocity ofthe steam in that section of a two or more stage superheater which is inthe hotter zone is evidently not limited `to this'particular form ofboiler or arrangement, but is o-rather general application. llt may bepointed out that the stage ofthe superheater in the cooler region neednot be in two sections, but may be 1n more, or may be in one; and that`instead o two, there may be more than two stages. lin the present casethe two sections l24, 24 are in effect one superheater and may `be soconsidered for conveniene. Applications of the feature iust spoken ofi'will occur in practice in vvarious connections and need not be morefully described here.

Evidently the superheaters 24, 24 need. not be et any particular design.prefer to make them of separate, readily detachable, looped units,secured to a bi-chambered header, and make provision for ready removalof a unit from the setting after it has been detached from `its header.Thisprovision consists in thel slot-shaped openings 29, 29, which ofcourse are normally closed by doors.

The slots 29are parallel to the planes of `the superheater units; andthey lieopposite spaces 29a. When a unit is to be removed, itsconnection to the headers is broken, and it is then raised above theother units and brought'opposite the slot 29, through which it can'beremoved. 1f the boiler is close to a wall, or to the setting of the nextboiler, the unit can, during its removal, be given the positionindicated in dotted lines in the left half of F ig. 3, i. e. it can beremoved diagonallyupward, a portion of it projecting downward into space29a during this removal.

1n Fig. 5 1 show my invention applied to a boiler of a different type,but sharing with the one vdescribed above the characteristic of havingtwo downwardly diverging banks of tubes defining a furnace space betweenthem. rlhese groups, la, 1 are secured to an upper drum 30 and two lowerdrums 31, 31. Two other upper drumsf32, 32, lie at either side of drum30, and are connected to it by water and steam pipes, and to the drums31 by banks oftubes 5, 5. Appropriate baflling directs the products ofcombustion over the banks l, down through the spaces 8 between the banks1a and 5, among the tubes 5, and so to the outlets 11, 11. This boileris of a previously known design. A

l place my superheater here also in the upper part of the space betweenthe banks la'. The arrangement will be seen to be very similar to theone above described. A variation is introduced in the means forprotecting the superheater against the direct radiation from thefurnace. The means here used for this purpose are two sets oflire-bricks, arranged as will be clear from Figs. 5 and 6. Each, set ismade up of a number of pairs of bricks 33, their outer ends resting onledges 34 in the walls 35, and their inner endsmeeting each other. Thebricks are each somewhat longer than half the distance between the walls35. The pairs of each set are spaced, and the spaces of one set arestaggered relatively to those of the other.

lr' preferred, the construction of Fig. 7

may be used. Here a third wall 36 is placed.

between the other two, and the inner ends of the bricks rest on ledges37 of this middle wall. The bricks 33 are horizontal in this case.

Superheater's 24 are placed in spaces 8",

as in the ease first described, but a variation is introduced in theconnections. Instead of carrying the steam first through superheaters 24and then for a final heating through superheater 14, the order is herereversed, the steam being first carried by pipes 25a, 25a and 25b to thesuperheater 14, and from it, by means of, pipes 26a, 26 to superheaters24,24, whence it leaves by pipes 28", 28a for the points of consumption.rlf'his re-l versed order is desirable in some cases and may evidentlybe employed in the case tlrst described. 0n the other hand=the orderused there may if desired also be used here.

What I claim is 1. In a boiler the combination ot two downwardlydiverging banks of tubes, a furnace-in the lower part of the spacebetween the banks, a superheater in the upper part, means below thesuperheater' to intercept the direct radiation from the furnace buitpermitting the passage of .hot gases to the superheater, and ahood overthe superheater provided with a darnperedopening` at one side. V

2. In a boiler the combination of two downwardly diverging banks oftubes, a furnace in the lower part of the space between the banks, asuperheater in the upper part,

a second superheater on the outer side of one` of the banks of tubes,pipe connections from the steam space of the boiler to one of` thesuperheaters and from it to the other superheater, means below the firstsuperheater to intercept thel radiation from the 'furnace but permittinghot vgases to pass from the furnace to thetirst superheater, a-hood overthe superheater provided with a dampered opening at one side near itstop.

3. In a boiler the combination ot two.

downwardly diverging banks ot tubes, a furnace in the lower part ofthe'space between the banks, a superheater in the upper part, means tointercept direct radiation from the furnace toward the superheater butpermitting the passage of hot gases to it, a hood over the superheatercomprising two walls substantially parallel to the two banksV of tubesrespectively, one of these walls extending higher up than the other,

a horizontal partition extending from the top o f the shorter walltoward the other but terminating short of it, thus leaving an exit for-hot gases that have passed over the superheater, and a damper tocontrol'this exit.

4C. In -apparat-usot1 the class described, the combination of a wallhaving a slot, a

'plurality of superheater units, each com- 5. In apparatus of the classdescribed, the.

combination of a vertical wall having a vertical slot, a plurality ofsuperheater units, each comprising a plurality of pipe lengths and allits parts lying in a single plane, said units lying in vertical planesin a space adjacent to the lower end of the slot, there being a freespace in the group of units in alignment with the slot wide enough so`a, vunit may be inserted into' it; whereby, during removal andreplacement of a unit, it

may be brought into a position such that it projects into the space,diagonally upward through the slot, and out into the` space beyond thewall.l

BENJAMIN BRUIDO.

